Is your project linked to environmental protection, awareness or study, or to protecting human life? Perhaps you are developing a wildlife tracker, ocean buoy, environmental monitoring system or need to transfer emergency medical information? Do you need to be able to transmit and receive data anywhere? If so, this is the product for you! IOTA (Integrated Open-Source Transceiver for ARGOS) allows you to send and receive short bursts of data via the ARGOS satellite network, anywhere on Earth including the Polar regions.
The ARGOS system has been around for quite a while. It was created in 1978 by the French Space Agency (CNES), the National Aeronautics and Space Administration (NASA) and the National Oceanic and Atmospheric Administration (NOAA), originally as a scientific tool for collecting and relaying meteorological and oceanographic data around the world. Today, ARGOS is revolutionising satellite communication, adding a constellation of 25 nanosatellites to complement the 7 traditional satellites carrying ARGOS instrumentation. The first of these, ANGELS, is already in operation and SparkFun were among the first users to transmit data to ANGELS in October 2020. When the constellation is complete, there will be a maximum of 10-15 minutes between satellite passes.
Our transceiver shield has been tested and certified by Kinéis for ARGOS 2, 3 and 4 communication and IOTA uses the exact same RF design. Compared to other satellite communication systems, IOTA has a much lower current draw and will work with a very simple, very lightweight quarter-wave wire antenna. The ARTIC R2 chipset on IOTA operates from 3.3V and the on-board flash memory enables fast boot times. If you don’t need the full transmit power, or want to conserve your battery life, you can transmit at reduced power too thanks to the opto-isolated gain pin. The interface is 3.3V SPI and will work with a huge range of microcontrollers.
Our Arduino Library makes it really easy to get up and running with ARGOS. We’ve provided a full set of examples which will let you: configure the ARTIC R2 chipset; predict the next satellite pass; receive allcast and individually-coded messages; transmit messages using ARGOS 2, 3 and 4 encoding.
You will find the Eagle symbol and footprint for IOTA in the SparkFun Eagle Libraries - RF Library. Please see our Eagle Library Installation Guide if you have not used our libraries before..
Features:
- ARTIC-R2 Chipset
- Serial interface (SPI) for communication with MCU
- Programmable DSP core on board to ensure flexibility
- RX frequency : 466MHz
- TX frequency: 400MHz
- Fractional N frequency synthesis
- Supported TX standards:
- BPSK: PTT-A2 (ARGOS 2), PTT-VLD (ARGOS 4)
- QPSK: PTT-A3, PTT-ZE (ARGOS 3)
- GMSK: PTT-HD (ARGOS 3), PTT-MD (ARGOS 4), PTT-HD (ARGOS 4)
- Supported RX standards:
- BPSK: PMT-A3 (ARGOS 3)
- DSSS OQPSK: PMT-A4 (ARGOS 4) not available
- Supports COSPAS-SARSAT standard
- RFPA0133 Power Amplifier
- Boosts the 0dBm (1mW) output from the ARTIC by up to 26dB
- Typical maximum transmit power level: 400mW
- Programmable gain via the G8 breakout pin
- TCXO
- 26MHz temperature-compensated crystal oscillator for maximum stability
- SST25VF020B Flash memory
- Stores the ARTIC firmware, allowing fast boot times
- RF Screening Can
- Antenna Connection:
- u.FL
- or Breakout Pad
- Power requirements:
- 3.3V +/- 0.1V.
- Typical current draw:
- Sleep: 51µA
- Idle: 7.2mA (AVG)
- Receive: 32.9mA
- Transmit (G8 pin high): 226mA
- Transmit (G8 pin low): 170mA
- Weight: 3g (0.1oz)
Documents:
IOTA Documentation:
- Schematic
- Eagle Files
- SparkFun Eagle RF Library
- ARGOS Chipset Info Sheet
- ARTIC R2 User Datasheet v1.1
- GitHub Hardware Repo
- Hookup Guide
- Arduino Examples
- SparkFun ARGOS ARTIC R2 Arduino Library
- Test certificates:
- ARGOS 4 VLD Certificate (IOTA)
- ARGOS 2 Certificate (ARGOS ARTIC R2 Satellite Transceiver Shield)
- ARGOS 3 Certificate (ARGOS ARTIC R2 Satellite Transceiver Shield)
ARGOS ARTIC R2 Documentation:
